Saturday's clash at Dagenham is also in doubt and could be added to the backlog.
Crewe face the prospect of playing three games some weeks to get back on track, but Gradi believes the club's training facilities and strength in depth will give them the edge over their rivals.
"The more fixtures pile up the more it will suit us because we are still able to train, and because I have got enough for two good teams here," said Gradi.
"I have cover in virtually every position. We will be playing three games a week and the trick will be to rotate the players."